elegans, Tetragonopterus Steindachner [F.] 1882:179 [Anzeiger der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftlichen Klasse v. 19 (no. 19); ref. 20487] Obidos, Amazon River, Brazil. Syntypes: (several) ?MCZ 90014 (2) Obidos; NMW 57390 (8). Species later illustrated and described in more detail in Steindachner 1882:36, Pl. 7 (fig. 4) [ref. 14353]. •Valid as Hemigrammus elegans (Steindachner 1882) -- (Taphorn 1992:206 [ref. 23654] as cf. elegans, Lima & Oyakawa in Reis et al. 2003:131 [ref. 27061], Bertaco & Carvalho 2005:147 [ref. 28675], DoNascimiento et al. 2017:[7] [ref. 35679], Lima & Marinho 2024:174 [ref. 40817]). Current status: Valid as Hemigrammus elegans (Steindachner 1882). Acestrorhamphidae: Pristellinae. Distribution: South America: Amazon and Tapajõs River basins in Brazil; ? Apure and Aguaro River basins, Venezuela. Habitat: freshwater.